Lenovo is giving fans of professional laptop chic a treat today: in addition to shipping the ThinkPad Edge E431 and E531, it's unveiling one more model, the ThinkPad S431. The new Ivy Bridge-powered system is closer to the Edge S430 in spirit, carrying a similar 0.8 inches thick chassis, an aluminum lid and a thin-bezel design that stuffs a 14-inch touchscreen into a small body. It does carry the newer Edge line's unifying OneLink connector and gesture-friendly touchpad, although the svelter profile also involves some sacrifices -- the S431 tops out at 8GB of RAM and a 500GB hard drive, or about half what its peers can manage. The slimmer, touch-enabled design will also boost the asking price to $699 when the S431 ships in June, although the cost conscious can spring for the E431 and E531 today for a distinctly cheaper $599.